package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.BusinessDataVO;
import com.sky.vo.OrderReportVO;
import com.sky.vo.SalesTop10ReportVO;
import com.sky.vo.UserReportVO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.aspectj.weaver.ast.Var;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 用户统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        //获取时间区间内每一天的时间（ServiceImpl）
            //定义一个集合来封装每一天的时间
        List<LocalDate> dateList=new ArrayList<>();
            //把第一天的时间传入集合（时间集合对象)
        dateList.add(begin);
            //剩下的每一天插入第一天后面（循环插入)
        while (!begin.equals(end)){
            //当前时间等于最后一天则结束循环
            //新的起始天 = 起始天+1
            begin = begin.plusDays(1);
            //新的起始天存入集合
            dateList.add(begin);
        }

        //定义两个list用来封装每天的新增用户数量和总用户量
        List<Integer> newUserCountList = new ArrayList<>();
        List<Integer> totalUserCountList = new ArrayList<>();
        //根据条件查询每一天的用户数据（循环查找）
        for (LocalDate date : dateList) {
            //获取当天最小时间，年月日时分秒（00:00:00）
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            //获取当天最大时间，年月日时分秒（23:59:59）
            LocalDateTime emdTime = LocalDateTime.of(date, LocalTime.MAX);
            //创建一个集合对象
            Map map = new HashMap();
            //查询mysql 获取当天的总用户数量
            map.put("end",emdTime);
            Integer totalUserCount =userMapper.getUserCount(map);
            //查询mysql获取当天的新增用户数量
            map.put("begin",begin);
            Integer newUserCount = userMapper.getUserCount(map);
            //插入数据到list中
            newUserCountList.add(newUserCount);
            totalUserCountList.add(totalUserCount);
        }
        //封装数据VO并返回
        UserReportVO vo = UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserCountList, ","))
                .totalUserList(StringUtils.join(totalUserCountList, ","))
                .build();
        return vo;
    }

    /**
     * 订单统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO orderStatistics(LocalDate begin, LocalDate end) {
        //获取时间内每一天的时间
        //创建集合对象存储时间
        ArrayList<LocalDate> dateList = new ArrayList();
            //插入第一天的时间(初始时间)
        dateList.add(begin);
            //在第一天后插入每天的时间
        begin = begin.plusDays(1);//在指定的时间+1天
        dateList.add(begin);//把每一天的日期加入list集合中
        //定义两个list用来封装每天的总订单数和有效订单数
        List<Integer> totalOrdersCountList = new ArrayList<>();
        List<Integer> validOrdersCountList = new ArrayList<>();
        //查询mysql,查询每天的总订单数和有效订单数
        for (LocalDate date : dateList) {
            //获取当前时间的最小时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            //获取当前时间的最大时间
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询mysql 获取当天的总订单数
            Map map=new HashMap();
            map.put("end",endTime);
            map.put("begin",beginTime);
            Integer totalCount = orderMapper.getOrderCount(beginTime);
            //查询mysql获取当天的有效订单数量
            map.put("end",endTime);
            Integer validCount = orderMapper.getOrderCount(endTime);
            //将数据插入集合中
            totalOrdersCountList.add(totalCount);
            validOrdersCountList.add(validCount);
        }
        //获取时间区间内的总订单数和有效订单数以及订单完成率
        //使用聚合函数求总数
        Integer totalOrdersCount = totalOrdersCountList.stream().reduce(Integer::sum).get();
        //使用聚合函数求完成率
        Integer validOrdersCount = validOrdersCountList.stream().reduce(Integer::sum).get();
        //订单完成率=有效订单数/总订单数
        Double orderCompletionRate = 0.0;
        if (totalOrdersCount != 0){
            orderCompletionRate = validOrdersCount.doubleValue()/totalOrdersCount;
        }
        //3.返回数据
        OrderReportVO vo = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(totalOrdersCountList, ","))
                .validOrderCountList(StringUtils.join(validOrdersCountList, ","))
                .totalOrderCount(totalOrdersCount)
                .validOrderCount(validOrdersCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

        return vo;
    }

    /**
     * top10
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        //转化时间格式
            //获取最小时间
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
            //获取最大时间
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        //根据时间区间查询销量(订单表和详情表),菜品名以及销售数量
            //使用DTO对象
        List<GoodsSalesDTO> goodsSalesDTOS = orderMapper.getSalesTop10(begin,end);
        //获取名称列表
        List<String> nameList = goodsSalesDTOS.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        //获取销量列表
        List<Integer> numberList = goodsSalesDTOS.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        //封装VO,并返回数据
        SalesTop10ReportVO vo = SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList, ","))
                .numberList(StringUtils.join(numberList, ","))
                .build();

        return vo;
    }

    /**导出近30天的运营数据报表
     * @param response
     **/
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }

}
